Tatum, LLC

                Interim Part - Time Executive Services Agreement


March 17, 2006

Bruce A. Kehr, MD
Chairman and Chief Executive Officer
InforMedix
Georgetowne Office Park
5880 Hubbard Drive
Rockville, MD 20852

Dear Dr. Kehr:

Tatum,  LLC ("Tatum")  understands  that InforMedix  ("the Company")  desires to
engage a partner of Tatum to serve as interim part-time chief financial officer.
This Interim Part -Time Executive  Services  Agreement sets forth the conditions
under which such services will be provided.

Services; Fees

Tatum will make  available to the Company Larry D. Grant (the "Tatum  Partner"),
who will serve as chief financial officer of the Company. The Tatum Partner will
become an employee and, if  applicable,  a duly elected or appointed  officer of
the Company  and  subject to the  supervision  and  direction  of the CEO of the
Company,  the board of  directors of the  Company,  or both.  Tatum will have no
control or supervision over the Tatum Partner.

The  Tatum  Partner  will  work two (2) days per work  week (or 40% of full time
equivalency)  for which the Company will pay the Tatum Partner directly a salary
of $10,800  per month  ("Salary"),  so long as the  Company  utilizes  the Tatum
Partner for at least three  consecutive  months under this  agreement  ("Minimum
Period"). In the event that the Company elects to terminate this agreement prior
to the Minimum  Period,  than the Company  will be  obligated  to  retroactively
adjust the Salary to $12,000  per  month,  and shall  immediately  pay the Tatum
Partner the  "make-up"  differential  for the  relevant  short-period  for which
services were provided.

In  addition,  the  Company  will pay  directly to Tatum a fee of $2,700 a month
("Fees") as partial  compensation for resources  provided so long as the Company
utilizes  the Tatum  Partner for at least three  consecutive  months  under this
agreement.  In the event that the Company  elects to  terminate  this  agreement
prior to the Minimum Period, than the Company will be obligated to retroactively
adjust  the Fees to  $3,000  per  month,  and  shall  immediately  pay Tatum the
"make-up"  differential  for the relevant  short-period  for which services were
provided.

The Company will have no  obligation  to provide the Tatum Partner any health or
major medical benefits,  stock, or bonus payments. The Tatum Partner will remain
on his or her current medical plan.


<PAGE>

Payments; Deposit

Payments  to Tatum  should  be made by  direct  deposit  through  the  Company's
payroll,  or by an automated  clearing house ("ACH") payment at the same time as
payments are made to the Employee.  If such payment  method is not available and
payments are made by check,  Tatum will issue  invoices to the Company,  and the
Company agrees to pay such invoices no later than ten (10) days after receipt of
invoices.

The Company will reimburse the Tatum Partner directly for out-of-pocket expenses
incurred by the Tatum Partner in providing services hereunder to the same extent
that the Company is  responsible  for such  expenses  of senior  managers of the
Company.

Company  agrees to pay Tatum and to  maintain a security  deposit of $13,500 for
the Company's  future  payment  obligations  to both Tatum and the Tatum Partner
under this agreement (the "Deposit"). If the Company breaches this agreement and
fails to cure such breach as provided in this agreement,  Tatum will be entitled
to apply the Deposit to its damages resulting from such breach. Upon termination
or expiration of this agreement, Tatum will return to the Company the balance of
the Deposit  remaining after  application of any amounts to unfulfilled  payment
obligations of the Company to Tatum or the Tatum Partner as provided for in this
agreement.

Converting Interim to Permanent

The  Company  will have the  opportunity  to make the Tatum  Partner a permanent
member of Company  management  at any time during the term of this  agreement by
entering  into  another  form of Tatum  agreement,  the  terms of which  will be
finalized at such time, but which include the following general terms:

1.    The  Company  will  pay  Tatum a 25%  cash  fee at the  date  of such  new
      agreement,  calculated as a percent of 1st year normalized annualized cash
      compensation (annual base salary and annual cash bonus potential,  both of
      which are to be negotiated);

2.    The Company will pay Tatum $1,000 per month as an additional resource fee,
      so long as the Tatum Partner is permanently employed and/or paid a monthly
      severance amount related to the permanent employment;

3.    The Tatum Partner will allocate 15%, to Tatum on a derivative  basis,  any
      proceeds arriving from any equity instruments issued by the Company to the
      Tatum Partner as part of his or her permanent compensation agreement.

Hiring Tatum Partner Outside of Agreement

During the twelve (12)-month period following  termination or expiration of this
agreement,  other than in connection with another Tatum  agreement,  the Company
will not employ the Tatum Partner, or engage the Tatum Partner as an independent
contractor,  to render services of substantially  the same nature as those to be
performed by the Tatum Partner as contemplated  by this  agreement.  The parties
recognize and agree that a breach by the Company of this provision  would result
in the loss to Tatum of the  Tatum  Partner's  valuable  expertise  and  revenue
potential  and  that  such  injury  will  be  impossible  or very  difficult  to
ascertain.  Therefore,  in the event this  provision is breached,  Tatum will be
entitled to receive as liquidated  damages an amount equal to forty-five percent
(45%) of the Tatum Partner's  Annualized  Compensation (as defined below), which
amount the parties  agree is  reasonably  proportionate  to the probable loss to
Tatum and is not intended as a penalty.  If, however, a court or arbitrator,  as
applicable,  determines  that  liquidated  damages are not  appropriate for such
breach, Tatum will have the right to seek actual damages. The amount will be due
and  payable to Tatum upon  written  demand to the  Company.  For this  purpose,
"Annualized  Compensation" will mean monthly Salary equivalent to what the Tatum
Partner would receive on a full-time  basis  multiplied by twelve (12), plus the
maximum  amount of any bonus for which  the  Tatum  Partner  was  eligible  with
respect to the then current bonus year.


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<PAGE>

Term & Termination

Effective  upon thirty  (30) days'  advance  written  notice,  either  party may
terminate this agreement, such termination to be effective on the date specified
in the notice, provided that such date is no earlier than thirty (30) days after
the date of delivery of the notice.  Tatum will continue to render  services and
will be paid during such notice period.

Tatum  retains the right to  terminate  this  agreement  immediately  if (1) the
Company is  engaged  in or asks the Tatum  Partner to engage in or to ignore any
illegal or unethical  activity,  (2) the Tatum Partner dies or becomes disabled,
(3) the Tatum Partner  ceases to be a partner of Tatum for any other reason,  or
(4) upon written  notice by Tatum of  non-payment  by the Company of amounts due
under this  agreement.  For purposes of this  agreement,  disability  will be as
defined by the applicable  policy of disability  insurance or, in the absence of
such insurance, by Tatum's management acting in good faith.

In the event that either party  commits a breach of this  agreement,  other than
for reasons described in the above paragraph,  and fails to cure the same within
seven (7) days following  delivery by the non-breaching  party of written notice
specifying the nature of the breach, the non-breaching party will have the right
to terminate  this agreement  immediately  effective upon written notice of such
termination.

Insurance

To the extent the Company has  directors' and officers'  liability  insurance in
effect,  the Company will provide such insurance coverage for the Tatum Partner,
along with written evidence to Tatum or the Tatum Partner that the Tatum Partner
is covered by such insurance.

Furthermore,  the Company will maintain such insurance  coverage with respect to
occurrences  arising  during  the term of this  agreement,  at the same level as
provided for the Directors,  including any extended reporting period, or "tail,"
policy.

Disclaimers, Limitations of Liability & Indemnity

Tatum assumes no  responsibility or liability under this agreement other than to
render the services  called for  hereunder and will not be  responsible  for any
action  taken by the Company in  following or declining to follow any of Tatum's
advice or  recommendations.  Tatum  represents  to the  Company  that  Tatum has
conducted its standard  screening and  investigation  procedures with respect to
the Tatum Partner  becoming a partner in Tatum, and the results of the same were
satisfactory to Tatum.  Tatum disclaims all other warranties,  either express or
implied.  Without  limiting  the  foregoing,  Tatum makes no  representation  or
warranty as to the accuracy or reliability of reports,  projections,  forecasts,
or any other information  derived from use of Tatum's resources,  and Tatum will
not be  liable  for  any  claims  of  reliance  on  such  reports,  projections,
forecasts,  or information.  Tatum will not be liable for any  non-compliance of
reports, projections, forecasts, or information or services with federal, state,
or  local  laws  or  regulations.  Such  reports,  projections,   forecasts,  or
information  or  services  are for the sole  benefit of the  Company and not any
unnamed third parties.

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<PAGE>

In the event that any partner of Tatum (including  without  limitation the Tatum
Partner  to the extent  not  otherwise  entitled  in his or her  capacity  as an
officer of the  Company)  is  subpoenaed  or  otherwise  required to appear as a
witness or to provide  evidence in  connection  with any action,  suit, or other
proceeding  initiated by a third party or by the Company  against a third party,
then the Company shall  reimburse  Tatum for the  reasonable  costs and expenses
(including  reasonable  attorneys'  fees)  actually  incurred  by  Tatum or such
partner.  Further,  the Company shall provide Tatum with compensation at Tatum's
customary  rates which shall not  materially  differ from the rates  included in
this agreement, prorated, for the time incurred.

The  Company  agrees  that,  with  respect to any claims the  Company may assert
against  Tatum in connection  with this  agreement or the  relationship  arising
hereunder, Tatum's total liability will not exceed two (2) months of Fees.

As a condition for recovery of any liability,  the Company must assert any claim
against  Tatum  within three (3) months after  discovery or  one-hundred  eighty
(180) days after the termination or expiration of this  agreement,  whichever is
earlier.

Tatum will not be liable in any event for incidental,  consequential,  punitive,
or special damages,  including without limitation,  any interruption of business
or loss of business, profit, or goodwill.

Arbitration

If the parties are unable to resolve any dispute arising out of or in connection
with this  agreement,  either  party may refer the dispute to  arbitration  by a
single arbitrator selected by the parties according to the rules of the American
Arbitration  Association  ("AAA"),  and the decision of the  arbitrator  will be
final and binding on both  parties.  Such  arbitration  will be conducted by the
Atlanta, Georgia, office of the AAA. In the event that the parties fail to agree
on the selection of the arbitrator  within thirty (30) days after either party's
request for arbitration  under this paragraph,  the arbitrator will be chosen by
AAA. The arbitrator may in his discretion order documentary  discovery but shall
not allow depositions  without a showing of compelling need. The arbitrator will
render his decision within ninety (90) days after the call for arbitration.  The
arbitrator  will have no authority to award  punitive  damages.  Judgment on the
award of the arbitrator may be entered in and enforced by any court of competent
jurisdiction.  The arbitrator  will have no authority to award damages in excess
or in  contravention  of this  agreement  and may not  amend  or  disregard  any
provision of this  agreement,  including  this  paragraph.  Notwithstanding  the
foregoing,  either party may seek appropriate  injunctive relief from a court of
competent jurisdiction, and either party may seek injunctive relief in any court
of competent jurisdiction.


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<PAGE>

Miscellaneous

Tatum will be entitled to receive all reasonable  costs and expenses  incidental
to the collection of overdue amounts under this Resources  Agreement,  including
but not limited to attorneys' fees actually incurred.

Neither the Company nor Tatum will be deemed to have waived any rights or
remedies accruing under this agreement unless such waiver is in writing and
signed by the party electing to waive the right or remedy. This agreement binds
and benefits the respective successors of Tatum and the Company.

Neither party will be liable for any delay or failure to perform under this
agreement (other than with respect to payment obligations) to the extent such
delay or failure is a result of an act of God, war, earthquake, civil
disobedience, court order, labor dispute, or other cause beyond such party's
reasonable control.

The provisions concerning payment of compensation and reimbursement of costs and
expenses, limitation of liability, directors' and officers' insurance, and
arbitration will survive the expiration or any termination of this agreement.

This agreement will be governed by and construed in all respects in accordance
with the laws of the State of Georgia, without giving effect to
conflicts-of-laws principles.

The terms of this agreement are severable and may not be amended except in
writing signed by the party to be bound. If any portion of this agreement is
found to be unenforceable, the rest of the agreement will be enforceable except
to the extent that the severed provision deprives either party of a substantial
benefit of its bargain.

Nothing in this agreement shall confer any rights upon any person or entity
other than the parties hereto and their respective successors and permitted
assigns and the Tatum Partner.

Each person signing below is authorized to sign on behalf of the party
indicated, and in each case such signature is the only one necessary.

Bank Lockbox Mailing Address for Deposit and Fees:

Tatum, LLC
P.O. Box 403291
Atlanta, GA  30384-3291
Electronic Payment Instructions for Deposit and Fees:

         Bank Name:  Bank of America
         Branch:  Atlanta
         Routing Number:                For ACH Payments:  061 000 052
                                        For Wires: 026 009 593
         Account Name: Tatum, LLC
         Account Number: 003 279 247 763
         Please reference InforMedix in the body of the wire.


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<PAGE>

Please sign below and return a signed copy of this letter to indicate the
Company's agreement with its terms and conditions.


We look forward to serving you.


Sincerely yours,


TATUM, LLC                              Acknowledged and agreed by:

                                        InforMedix

/s/ Robert P. Hostetler                 /s/ Bruce A. Kehr
                                        ----------------------------
Signature                               Signature

Robert P. Hostetler
Area Managing Partner for TATUM, LLC    Bruce A. Kehr, MD
                                        Chairman and CEO

                                        March 17, 2006
                                        ----------------------------
                                        (Date)


                                        March 17, 2006
                                        ----------------------------
                                        (Date)



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